1 8 Memoirs on the Coleoptera 



Lioanones n. gen. 



This genus differs from the preceding in its partially glabrous and 

 very shining integuments, very strongly, apically tubulate pro- 

 thorax, shorter beak and antennae and especially in the structure 

 of the antennal club, which is here more briefly oval, with its 

 basal segment constituting more than half the mass — not much 

 less than half as in Anones. The tarsal claws are connate at base 

 and are still smaller than in the preceding, being somewhat as in 

 Eumicronyx, though there the claw-joint is more slender. The 

 type may be described as follows: 



Lioanones tubulatus n. sp. — Subrhomboidal, convex, polished, piceous-black, 

 glabrous above, except that there are sparse whitish hair-like squamules in a 

 basal and posterior sutural area; prosternum, except posteriad, and sides of the 

 pronotum also with some white squamules, these more conspicuous on the sterna 

 of the hind body throughout and dense on the meso- and met-episterna, fine 

 and sparse on the abdominal segments distally, also on the fifth segment; beak 

 not as long as the head and prothorax in either sex and notably short in the 

 male, feebly arcuate, sculptured and sulculate basally, not noticeably tapering; 

 prothorax almost one-half wider than long, the sides parallel and broadly arcuate, 

 very rapidly converging well beyond the middle to the long apical tubulation, 

 which is somewhat more than half as wide as the base; punctures rather strong 

 but sparse, wanting on the tubule; scutellum trapezoidal, feebly punctulate; 

 elytra more elongate than in the preceding, acutely parabolic, three-sevenths 

 longer than wide, two-fifths wider than the prothorax, the humeri obliquely 

 rapidly converging but not at all externally prominent; striae rather coarse, deep, 

 feebly crenulate; intervals not quite flat, convex laterally, feebly carinulate 

 behind the humeri, finely, very sparsely punctate; under surface more closely 

 punctate, sparsely on most of the abdomen; femora narrow, the spicule small. 

 Length (o 71 ?) 2.3-2.4 mm.; width 1.35 mm. Brazil (Chapada). November. 

 Two specimens. 



The base of the prothorax is only very feebly lobed and there is, 

 throughout the width, a thickened bead-like margin which is not 

 apparent in Anones. 



Eumicronyx n. gen. 



The general appearance of the species in this genus is highly 

 distinctive, both in bodily form and ornamentation. In abdominal 

 structure they form an exception in the entire tribe, the third and 

 fourth segments, though evidently shorter than the others, being 

 less abruptly abbreviated, with the two penultimate sutures barely 

 at all reflexed at the sides. The beak is moderate, the antennal 

 club rather stout, oval, with its basal segment more than half the 

 mass, and the pronotum is unbeaded at base. The femora are very 

 feebly clavate, with small but distinct denticle, and the claws are 

 minute and connate at base, the claw-joint conspicuously slender 

 when compared with the width of the preceding three joints, the 

 third moderately bilobed as usual. The anterior coxae are contig- 

 uous. There are three species at hand as follows: 



